Ore-concentrator



E. UEISTER.

ORE CONCENTRATOR.

APPLICATION FILED, DEC. 26. 1919.

y 1,382,25Y5. PatentedJuneZl, 1921.

l #3 o v "l w i llllllll lllllllll Q A TTORNEYI EMIL DEISTERyOF FORT WAYNE, INDIANA,

PANY, OF FORT WAYN 13 INDIANA, .A CORPRATION.

AssreNoR ro :Deism-ER ORE- CON CEN T'RATUR. i

Specification of Letters Patent. Patented June 21 1921.

Application led December 26, v1919'. Serial No. {3Q-7,509;

form of riiiing is used which adds greatly to the efficiency of the table.

'In the accompanying drawings I have illustrated an embodiment of the invention in which- Figure 1 is a plan view of the deck of a concentrating table constructed in. accordance with the invention;

F g. 2 a. cross-sectional View on line 2 2 2K of Fig. 1;

Fig. 3 a crosssectional View on line 3-3 of Fig. l;

Fig. 4 a cross-sectional view in an enlar ed scale on line 3--3 of Fig. 1;

ig. 5 a plan view of the deck of the table illustrating a modification ofthe riiiiing thereon;

- Fig. 6 a cross-section view on line 6-6 of Fig. 5 in an enlarged scale; and

Fig. 7 a side elevationalview of one of the rifiles Yillustrated in Fig. 5.

Referring to the drawings,` l0. indicates the deck of a concentrating table, 11 being the head motion' end of the same, 12 the feed and dressing water side, 13 the concentrates discharge end and 14 the tailings discharge side. he arrow 15 indicates the direction of differential reciprocation of the deck and the approximate point' of attachment of the drlving mechanism to the deck.-

The body of the deck is covered with linoleum 16 or other suitable material, and its A surface is formed in three sections A, B and C. Section C, the plateau, is elevated abovel section A and section .B' slopesl upwardly from section A to section (l, the coterminal lines a b and c d' of section B ,and the other two sections respectively Abeing .preferably parallel and oblique te the line 'of reclproca- "tionof the table.

' scribed, are most Main riffies 17 are suitably secured tov the deck over the linoleum and they extend ,in the direction of travel of the concentrates toward the concentrates discharge end 13 of the deck, their forward ends terminating on `thebbhque coterminal line c d, which line indicates the rear edge of section C'. Each main rifHe 17 is beveled on its under side, as

at 18, where the same'contacts with section B, asshown in Figs. 2 and y7, and it is preferablyrbeveled ofi' on its lower side at its forward end, as shown in Figs. l and 5, said lower side of the rilHe being that facing the talllngs discharge side of the deck. As shown 1n Fig. 4, a portion, as 19, of the top surface of ch main riiiieis parallel to the surface of tliudeck and the remainder, as 20, of said top s rface slopes downwardly to# ward the tailings discharge side of the deck, the upper side 21 and lower side 22-the opposlte Ysides of each -riflle-being substan? tlally at right angles to the surface of the d eck. Hence the upper side 2l of each main riflle is higher than its opposite or lower lidf and each said--riille is wider than it is The main rifles, constructed as above desuitable for treating material in which the greater percentage thereof ranges 1n size from one-quarter inchdown to thirty mesh. AAs the pulpv flows over the riiiies in the direction indicated by arrow 23, Fig. 4, the upper side or wall 2l of each riifle retards the flow of the pulp sufficiently to cause a portion of the slope 2() of the riiiie above it to be Hooded with water thereby covering the upper edge of the lower side or wall 22 of the latter riflie, and preventing a fall of water over said .edge into the trough or channel immediately above said up er wall 21` Stratification of the minerals egins on the portion 19 of each main rilile and the sloping portion 20 permits' the concentrates tQ slide down the same into the channel below it instead of suddenlyl dropping into said channel'over'an unsubmergededge of the riliie. A sudden drop of the concen- -trates into a channel over a non-submerged tated and more or lessof them are i continu` ously washed out of the channels and overv the res below in succession down the Slo e i of the deck, whereas it is desirable to retain MACHINE (JOM-l loo.,

inthe channels all minerals caught therein and to guide them under the influence of the reciprocating movement of the table to- Ward the concentrates discharge `end of the deck.

Wall 22 of each riile is as important as wall 21 for the protection of the mineral in the channels to prevent the same from being washed outofI the channels. The width of the riflles, the sloping portions of their toprsurfaces and the submerged upper edges of the lower sides or walls of the riiles all contribute to direct the water contained in the pulp in practically a straight line or sheet over the riflletops and thereby substantially eliminate all excavating action of 4the water on the materials in the channels.

When the materials fed tothe table are rich in minerals I may secure to the top flat surfaceof the forward portion'of each main 'of thev plateau C shallow riiiles 2G, the rear ends of which labut the terminals of the main rililes 17. These extension riiles serve l to convey the minerals from the channels between `the main rilies to the concentrates discharge end of the deck.

What I claim is: 1. In a transversely inclined diiferentially reciprocatingy concentrating table the combination with a deck, ofmain riffles thereon extending in the direction of travel of the vininerals toward the mineral discharge end of the deck and having a ,portion of their upper surfaces sloping downwardly toward v the tailings discharge side of the deck and a flat portion substantially parallel with the surface of the deck, each of said rifles having sidewalls substantially at right angles to the surface of the deck, the portion of each said, rime facing the feed side of the deck being greater in height than the .opposite side thereof and the width of eachl riiie being substantially greater than the heightthereof, the forward end of each said rille being .tapered to reduce its height and cap riflles on the flat portion of the upper surface of the main riilies to .increase the height of the upper vertical sidewalls of the rillles.

2. In a transversely inclined diiferentially reciprocating concentrating table, the combination with a deck, of main riilies thereon extending in the direction of travel of the minerals toward the mineral discharge end of the deck and having a portion of their upper surfaces ilat and substantially parallel to the surface of the deck and a portion sloping downwardly toward the tailings discharge side of the deck, each of said rilles@ having side walls substantially at right angles to the surface of the deck, the portion of each rile facing the feed side of the deck being greater in height than the opposite side thereof and the width of the each. riffle being substantially greater than -the height thereof, and cap rifles on the flat portions of the main riles at the forward ends thereof to increase the height of the upper vertical side walls of the main rillles for'the purposes described.

In witness whereof I have-hereunto subscribed my name this 24thfday of December, 

